0=x^2-3x-24

Solution for 0=x^2-3x-24 equation:

0=x^2-3x-24

We move all terms to the left:

0-(x^2-3x-24)=0

We add all the numbers together, and all the variables

-(x^2-3x-24)=0

We get rid of parentheses

-x^2+3x+24=0

We add all the numbers together, and all the variables

-1x^2+3x+24=0

a = -1; b = 3; c = +24;
Δ = b2-4ac
Δ = 32-4·(-1)·24
Δ = 105
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-\sqrt{105}}{2*-1}=\frac{-3-\sqrt{105}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{105}}{2*-1}=\frac{-3+\sqrt{105}}{-2}
$